<template>
  <!-- 页面布局容器 -->
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 身体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#E22018" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <!-- 二级菜单模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主要内容 -->
      <el-main>
        <!-- main模块的路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return {
      menulist:[],
      iconObj:{
        '125':'iconfont icon-icon_users',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-lock_fill',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isCollapse:false,
      activePath:''
    }
  },
  //   页面一打开就调用函数 所以用了生命周期函数
  created() {
    this.getMenuList();
    this.activePath=window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    async getMenuList() {
      const { data } = await this.$http.get("menus");
      // console.log(data);
      if(data.meta.status!=200) return this.$message.error(data.meta.msg)
      this.menulist=data.data
    },
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath){
      this.activePath=window.sessionStorage.setItem('activePath',activePath)
      this.activePath=activePath
    }
  }
};
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  > div {
    display: flex;
    align-items: center;
  }
  span {
    color: #fff;
    font-size: 20px;
    margin-left: 15px;
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button{
  height: 20px;
  background-color: #4A5064;
  color: #fff;
  font-size: 10px;
  text-align: center;
  line-height: 20px;
  // 增加文字之间的间距
  letter-spacing: 0.2em;
  // 鼠标经过时变成小手
  cursor: pointer;
}
</style>